disagree with some of the above - the dictionary use is a pain if the word you want is near the bottom RH corner of screen - takes a lots of fiddly button presses to place the cursor - and the dictionary does not have ALL words - ( but theres the option to go online I think which I've not tried)
a dictionary on a touch screen device would be easier, if you have small enough fingers to tap one word.

No, it does not. When you are reading a book and there is a word in the bottom you tap the cursor UP, instead of down. In this case, the cursor will start from the bottom most line.